I think you are missing the point. If guy's want to hunt trade trips then fine, I lost 11 mill of cargo and insurance to a guy who definitely didn't want my cargo, the past few days have been a lot of fun in Yembo, I got lazy and flew a straight route to the station, so it's partially my fault.
The confusing bit is the apparent motive for this groups attack, it hasn't been thought through, they should just say 'we like blowing up freighters'.. The whole bit about using up supply is , the whole area is booming from trade supply's.
Anyway it's all good, trading in this area is much more interesting, you would have to be suicidal to come here in a T9. Screw solo, switch to a heavily armed trader and fight back. Wanna see he how these guy's ( or guy) deal with Anaconda's,Pythons and Clippers